Which integral correctly computes the length of the curve

Last updated: 8/10/2022

Which integral correctly computes the length of the curve y=In(cos(x)) between x=0 and x=π/3 ? a) π/3 ∫₀tan(x) dx b) π/3 ∫₀2πln(cos(x))√(1+tan²(x)) dx c) π/3 ∫₀sec(x) dx d)π/3 ∫₀√(1 + (In(cos(x)))² )dx